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c9

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

what is crude oil

Back (Answer)

a finite resource found in rocks and is a mixture of many different compounds that boil at different temperatures

#2
Front (Question)

what is the crude oil mixture separated for

Back (Answer)

to make useful fuels

#3
Front (Question)

how can you separate a mixture of liquids

Back (Answer)

distillation

#4
Front (Question)

what are the most the compounds found in crude oil

Back (Answer)

hydrocarbons

#5
Front (Question)

what are the hydrocarbons in crude oil

Back (Answer)

alkanes that are saturated hydrocarbons

#6
Front (Question)

what is the mnemonic for the first 4 hydrocarbons

Back (Answer)

monkeys eat peeled bananas

#7
Front (Question)

how is crude oil separated

Back (Answer)

fractional distillation

#8
Front (Question)

what does the larger the molecule mean to a hydrocarbon

Back (Answer)

the larger the molecule, the higher the boiling point

#9
Front (Question)

how does fractional distillation work

Back (Answer)

-the crude oil is vaporised and fed into a fractioning column -inside the column there are many trays with holes to allow gases through. -the hydrocarbons condense to liquids when they reach their level that is at their boiling point. -different liquids collect on the trays at different levels.

#10
Front (Question)

how does a fractionating column work

Back (Answer)

a tall tower that is hot at the bottom snd cool at the top

#11
Front (Question)

what does a low viscosity mean

Back (Answer)

they are runny liquids

#12
Front (Question)

what do fractions with a smaller molecule have

Back (Answer)

have lower boiling points, low viscosity and are very flammable.

#13
Front (Question)

what does burning any fuel produce

Back (Answer)

carbon dioxide

#14
Front (Question)

what happens when pure hydrocarbons are burnt completely

Back (Answer)

they are oxidised to carbon dioxide and water

#15
Front (Question)

how do you test for water

Back (Answer)

blue cobalt chloride paper which will turn pink in contact with water

#16
Front (Question)

how can large hydrocarbons be broken down into smaller molecules

Back (Answer)

cracking

#17
Front (Question)

how can cracking be done

Back (Answer)

steam cracking - by heating a mixture of hydrocarbon vapours and steam to a very high temperature or catalytic cracking - by passing hydrocarbon vapours over a hot catalyst

#18
Front (Question)

what are the two methods of cracking

Back (Answer)

steam and catalytic

#19
Front (Question)

what happens during cracking

Back (Answer)

thermal decomposition reactions produce a mixture of smaller molecules which some are alkanes and some alkenes

#20
Front (Question)

what are alkenes

Back (Answer)

unsaturated hydrocarbons because they contain fewer hydrogen atoms..

#21
Front (Question)

how do you know if the molecule is unsaturated

Back (Answer)

double covalent bond between carbon atoms

#22
Front (Question)

what makes alkenes more reactive than alkanes

Back (Answer)

alkenes have a double carbon bond

#23
Front (Question)

how can you test for unsaturated compounds

Back (Answer)

bromine water which will turn from orange to colourless if there is unsaturated compounds

#24
Front (Question)

what is a fraction

Back (Answer)

liquids with different boiling ranges separated from a mixture of liquids